Summary
Ethanol was produced from xylose by converting the sugar to xylulose, using commercial xylose isomerases, and simultaneously converting the xylulose to ethanol by anaerobic fermentation using different yeast strains. The process was optimized with the yeast strain Schizosaccharomyces pombe (Y-164). The data show that the simultaneous fermentation and isomerization of 6% xylose can produce final ethanol concentrations of 2.1% w/v within 2 days at temperatures as high as 39°C.
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Abbreviations
- SFIX:
-
simultaneous fermentation and isomerization of xylose
- V p :
-
volumetric production (g ethanol·l-1 per hour)
- Q p :
-
specific rate (g ethanol·g-1 cells per hour)
- Y s :
-
yield from substrate consumed (g ethanol, g-1 xylose)
- ET:
-
ethanol concentration (% wt/vol)
- XT:
-
xylitol concentration (% wt/vol)
- Glu:
-
glucose
- Xyl:
-
xylose
- --m:
-
maximum
- --f:
-
final
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Lastick, S.M., Tucker, M.Y., Beyette, J.R. et al. Simultaneous fermentation and isomerization of xylose. Appl Microbiol Biotechnol 30, 574–579 (1989). https://doi.org/10.1007/BF00255362
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DOI: https://doi.org/10.1007/BF00255362